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<?php /** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * http://www.gnu.org/copyleft/gpl.html * * @file */ /** * External storage in PHP process memory for testing. * * In this system, each store "location" is separate PHP array. * URLs are of the form "memory://location/id". The id/value pairs * at each location are segregated by DB domain ID. * * @see ExternalStoreAccess * @ingroup ExternalStorage * @since 1.33 */ class ExternalStoreMemory extends ExternalStoreMedium { /** @var array[] Map of (location => DB domain => id => value) */ private static $data = []; /** @var int */ private static $nextId = 0; public function fetchFromURL( $url ) { [ $location, $id ] = self::getURLComponents( $url ); if ( $id === null ) { throw new UnexpectedValueException( "Missing ID in URL component." ); } return self::$data[$location][$this->dbDomain][$id] ?? false; } public function batchFetchFromURLs( array $urls ) { $blobs = []; foreach ( $urls as $url ) { $blob = $this->fetchFromURL( $url ); if ( $blob !== false ) { $blobs[$url] = $blob; } } return $blobs; } public function store( $location, $data ) { $index = ++self::$nextId; self::$data[$location][$this->dbDomain][$index] = $data; return "memory://$location/$index"; } /** * Remove all data from memory for this domain */ public function clear() { foreach ( self::$data as &$dataForLocation ) { unset( $dataForLocation[$this->dbDomain] ); } unset( $dataForLocation ); self::$data = array_filter( self::$data, 'count' ); self::$nextId = 0; } /** * @param string $url * @return array (location, ID or null) */ private function getURLComponents( $url ) { // @phan-suppress-next-line PhanSuspiciousBinaryAddLists It's intentional [ $proto, $path ] = explode( '://', $url, 2 ) + [ null, null ]; if ( $proto !== 'memory' ) { throw new UnexpectedValueException( "Got URL of protocol '$proto', not 'memory'." ); } elseif ( $path === null ) { throw new UnexpectedValueException( "URL is missing path component." ); } $parts = explode( '/', $path ); if ( count( $parts ) > 2 ) { throw new UnexpectedValueException( "Too components in URL '$path'." ); } return [ $parts[0], $parts[1] ?? null ]; } }
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